Rotary valve for internal-combustion engines.



E. A. EKLUND.

ROTARY VALVE FOR INERNAL COMBUSTION ENGINES.

APPLICATION FILED OCT. 29. 19|]- 1,286,260. Patented Dec. 3, 1918.

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ELMER A. fEKLUND, .OF SPENCER, SOU'DHDLAKOTA.

ROTARY VALVE FOR INTERNAL-CDMBUSTION ENGINES.

Specification of Lettersfatent.

Patented Dec. 3, 1918.

Application'led October 29, 1917. .'Seri'al N o. 199,049.

To allwhomz't vmay concern Be it known that I, ELMER A. EKLUNm'a citizen of the United States, residing at Spencer, rinthe county `of McCook andState of South'Dakota7 have invented cer-tain new and useful lImprovements in Rotary 'Valves for Internal-Combustion Engines, of -which the following is a specication, `reference being had to the accompanyingv drawings.

This invention rela-testo animproved rotary valve for internal combustion engines, and has for its primary object toprovidea simple .and efficient water cooled `valve of thistype.

It is a more particular object of the invention to provide a valve head forthe several engine cylinders, preferably cast en bloc, improved means for mounting andretaining the rotary valve members in said head,` and means for distributing a suitablelubricating oil upon the peripheralsurfaces o'f the rotary valves.

It is a further general object of my -in vention to provide avalveof'thetypeabove referred to which is simple lin its construction, reliable and effective in practical use and whichrmay be manufacturedand used in connection ywith internal combustion engines of various construction without necessitating any material, modifications therein.

With the above and other objects in -vew the invention consists in the combination, construction, and relative arrangement .of the several parts as will be hereinafter more fully described and subsequently pointed out in the appended claims.

'In f the accompanying drawings 'wherein '-I have illustrated the preferred embodiment of the Ainvention Aand -wherein fsi-milar reference characters `denote corresponding parts throughout the several views;

Figure 1 is a side elevation of the valve head illustrating the intake and exhaust connections -to the several rotary v valves Fig. 2 is an enlarged fragmentary -sectional View through the valve head showing the mountingand arrangement of one ofthe valves therein;

Fig. 3 is -a section V`taken on lthey line -3--3 of Fig. v2;

Fig. f4: is a detail perspective view of one of the rotary 1valves; and

Fig. is a similar view of one of the valve bushings.'

Referring in detail to the drawing 5 designates theseveral#cylindersof an internal combustion engine which, as illustrated, are preferably cast ,en bloc and. connected at their upper ends by an enlargement 6. 7 designa-tes the valve head which is adapted to be detachably secured upon the upper ends 6 of fthe engine cylinders by any preferred means. This valve head 7 is rectangular in form and of hollow construction. Equidistantly lspaced cylindrical valve casings '-8 exten-transversely through the head 7 and integrally connect the opposite side walls thereof. 'These valve casings are spaced 'from the .top wall ofthe head and integrally `connected Vto the bottom wall thereof. A longitudinal slot or opening 9 extends through this base portion of the valve casing and communicates with the interiorlthereof. vThe casing isprovided with internal longitudinally extending grooves 10at diametrically opposite points. Vithin yeach valve casingl a'l bushing is arranged, said-'bushing including an outer cylindrical Wall lllan'd an inner wall 12 concentrically spaced "from said outer wall. This inner wall vo'f vthe bushing is preferably' formed in 4two sections spaced .apart to provide a longitudinally extending annular chamber 13, said wall sectionsbeing permanently secured'to each otherat their ends. ing walls'll and12 are unconnected `at one of their ends andthe outer wall `11 projects longitudinally beyond the end of the inner wall, saidend of the inner cylindrical wall being closed 4as indicated at 14. kThe projecting end 'portion of the outer .wall 11 is exteriorly threaded to receive a cap nut 16, thepurpose ofwhich will presently appear.

1'7 designates the rotary valve member which is of tubular form/and closed lat one end. This valve member is adapted to be engaged lover'the inner cylindrical wall 12 of lthe bushinggand moved longitudinally between the bushing walls to the position seen in.Fig. v3 of lthe drawing. `The inner andfouterfwalls of thebushing are provided with coinciding longitudinally extending' slots 18 and l19 respectively which are in registering relation with the slot or opening 9 -in thebase ywall Yof the valve casing. The bushing is held against `rotary movement withinA the valve-casingvbymeans of the longit-udinal keys '.20 formed on the periphery of the wall 11 at diametrically `opposite points, said keys frictionally engaging in the-Ways or grooveslO provided in the wall ofthe valvecasing.

The bush- The rotary valve member 17 is also provided with a longitudinally extending port 21 in its wall which, in the operation ofv be apparent that the rotary valve member is retained within the bushing against axial movement in an outward direction. A crank arm 23 is secured upon the stem 22. Rods operated by cams, eccentrics or other suitable means are connected to the arms 23 of the respective rotary valves to actuate said valves in timed relation. As this operating means for the rotary valves constitutes no part of the present invention, it is not herein illustrated in detail.

Each of the rotary valves 17 is further provided at a point diametrically opposite the port 21 with a longitudinally extending slot 24. A suitable lubricating oil is supplied to the slots 24 of the valves through the medium of a pipe or conduit 25 extend ing through the head 7 and having communication with ports 26 formed in the top wall of each of the valve casings 8. It will be understood that an intake and exhaust valve constructed and mounted in the manner above explained is provided for each of the engine cylinders. The valves 17 at one of their ends are open for communication with the intake and exhaust connections designated 27v and 28 respectively which are secured to the side of the valve head 7. It will be noted from reference to Fig. 1 that the exhaust manifold 28 is disposed immediately above and in contact with the intake manifold 27 so that the gas charge will `be highly heated and vaporized in its passage through the manifold 27 to the several engine cylinders.

A radially extending opening 29 extends from the chamber 13 at the connected ends of the bushingl walls 11 and 12 outwardly to the periphery of the bushing and a duct or passage 30 extends through the top wall of the valve casing 7 and forms in effect a continuation of the opening 29.V 'Ihus the water in the hollow head 7 will flow through the passage 30 and opening 29 and fill the chamber 13 to edectively cool the inner wall of the valve bushin From the foregoing description taken in connection with the accompanying drawing, the construction7 manner of operation and several advantages of my improved valve will be clearly and fully understood. Water is continuously circulated through the head 7, entering the head at one end thereof through the pipe 31 and leaving the head at its opposite end through the pipe 32. This water flowing over and around the several casings 8, and through the inner walls thereof, cools the rotary valves mounted in said casings and eliminates the possibility of preignition of the gaseous charge. The several valves are rotated at proper times so as to bring the ports 19 thereof in registration with the openings 9 to exhaust the burned'y gases from the several cylinders and admit a fresh charge thereto. In the operation of the device, the lubricating oil is continuously supplied to the several valve members and inthe actuation of the valve member, this oil passes through the slot 24 therein for distribution over the inner faceof the outer wall 11 and the outer face of theinner |wall l2 of the bushing and upon the contacting surfaces of the rotary valve.' Thus the valves will operate with a minimum of friction so that the resurfacing or regrinding of the same will be avoided. The valves may however, be very easily and quickly removed from the valve head or reinserted in their operativepositions. The device as a whole is of relatively simple construction, and the severalV parts may be manufactured at small cost and installed for use in connection with various types of internal combustion engines without necessitating any material alterations in the latter. While I have herein shown and Vdescribed the preferred construction and arrangement of the several elements employed, it is to be understood that the same are susceptible of considerable modifications, and I therefore reserve the privilege of adopting al1 such legitimate changes as may be fairly embodied within the spirit and scope of the invention as claimed.

HavingV thus fully described my invention, what I claim and desire to secure by Letters Patent is :e

1. In a valve mechanism for internal combustion engines, a hollow head common to all of theengine cylinders having water inlet and outlet connections at its opposite ends, a plurality of valve casings extending transversely through said head, said head having ports opening` through one wall thereof and communicating with the respective valve casings, a double walled bushing fitted in each ofthe valve casings, the

.ing fitted within said casing, a rotary valve member engaged between the walls of the bushing, said bushing walls and the valve member having ports adapted to register in the operation of the valve, the inner Iwall of the bushing being ohambered, and means for supplying a cooling medium to said chamber.

3. In a valve for internal combustion engines, a hollow valve head having a easing extending transversely therethrough, a bushing fitted within the casing and having inner and outer spaced walls, a rotary valve member disposed between the walls of the bushing, said walls and the valve member having ports adapted to register in the operation of the valve, the inner wall of the bushing being chambered, and means for circulating 'water through said head, said bushing and the wall of the valve casing having registering passages aliording cominunieation between the hollow head and the chamber in the bushing Wall whereby Water is supplied to the latter.

In testimony whereof I hereunto aiix my signature in the presence of two witnesses.

ELMER A. EKLUN D.

Witnesses:

W. F. SHooP7 A. H. BRUER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

